11 12 005 Removing and Installing/Sealing Left Cylinder Head Cover (N73)

WARNING: This page is about a different car, the 2008 BMW 760Li and 2007 BMW 760Li. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove design cover.
Remove acoustic cover.
Remove center of assembly partition wall. See 51 71 085 REMOVING AND INSTALLING CENTER OF ASSEMBLY COMPARTMENT BULKHEAD
Remove cover and seal.
Remove upper section of intake filter housing and intake hose on left and right. See 13 71 010 REMOVING AND INSTALLING/REPLACING LEFT (OR RIGHT) INTAKE FILTER HOUSING (N73)
Remove intake air manifold. See 11 61 050 Removing and Installing Intake Air Manifold (N73)
Release engine wiring harness partially.
Disconnect ignition wiring harness plug connections.
Remove rod-type ignition coils. See 12 13 512 REMOVING AND INSTALLING/REPLACING ALL ROD-TYPE IGNITION COILS (N73)

IMPORTANT: Do not bend any high-pressure lines. See 13 53 175 REMOVING AND INSTALLING/REPLACING ALL PRESSURE LINES (N73)

Detach high-pressure lines (1) at mounting points (2).

On high-pressure pump:

Detach feed line (3).

Detach high-pressure line (4).

Detach leakage line (5).

On rail strip:

Detach high-pressure lines (6).

Fig 1: Identifying High-Pressure Lines With Mounting Points

Courtesy of BMW OF NORTH AMERICA, INC.

Remove servomotor for left eccentric shaft. See 11 37 022 Removing and Installing/Replacing Servomotor For Left And Right Eccentric Shaft (N73)

Release screws (1). Remove high-pressure pump (2).

Release screws (3). Remove spacer (4).

Illustrations show cylinders 1 to 6.

Fig 2: Identifying High Pressure Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Disconnect plug connection from secondary air valve (2)

air connection and remove towards top.

Installation:

Replace seal for secondary air valve (2).

Illustrations show cylinders 1 to 6.

Fig 3: Identifying Secondary Air Valve

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect plug connections on sensors (1).

Release screws on flange (2) and remove.

Release screws in area (3).

Remove cylinder head cover (4).

Installation:

Replace sealing elements for screw connection (3).

Insert screw connection (3) without pretension.

Tighten down screw connection (3) in diagonal sequence from inside to outside.

Fig 4: Identifying Screw Area

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Replace spark plug domes.

Coat rubber seals on spark plug dome with sealing compound.

When fitting cylinder head cover: Align spark plug domes to cylinder head cover.

Fig 5: Aligning Spark Plug Domes To Cylinder Head Cover

Courtesy of BMW OF NORTH AMERICA, INC.

Replace sealing ring (1).

Installation:

Press sealing ring (1) into cylinder head cover until flush.

Note installation direction of sealing ring (1).

Groove in sealing ring (1) points outwards.

Fig 6: Identifying Sealing Ring

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Clean seal residue from sealing surfaces.

Apply a thin and even coat of Drei Bond liquid sealant (sourcing reference: BMW Parts Service) in area (1):

at partition levels
at half-moon section

Replace cylinder head cover gasket.

Ensure that seals are correctly seated.

Fig 7: Identifying Liquid Sealant Applying Area

Courtesy of BMW OF NORTH AMERICA, INC.

Side.
Rear side of cylinder head.

Assemble engine.